(Q002) The Earth's atmosphere began as nitrogen and oxygen, left over from the solar nebula. acquires its carbon dioxide from photosynthesis by green plants. gets warmer as its carbon dioxide concentration goes down. became more oxygen-rich during the Proterozoic, after the evolution of photosynthetic organisms in the Archean
Question
(Q002) The Earth's atmosphere began as nitrogen and oxygen, left over from the solar nebula. acquires its carbon dioxide from photosynthesis by green plants. gets warmer as its carbon dioxide concentration goes down. became more oxygen-rich during the Proterozoic, after the evolution of photosynthetic organisms in the Archean
Solution
The Earth's atmosphere began primarily with nitrogen and oxygen, remnants from the solar nebula. Over time, the atmosphere has changed due to various biological and geological processes.
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The Earth's atmosphere did not acquire its carbon dioxide from photosynthesis by green plants. In fact, it's the other way around. Green plants absorb carbon dioxide from the atmosphere for photosynthesis, a process that produces oxygen.
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The Earth's atmosphere does not get warmer as its carbon dioxide concentration goes down. Instead, an increase in carbon dioxide concentration in the atmosphere leads to a warmer Earth. This is due to the greenhouse effect, where carbon dioxide traps heat from the sun, preventing it from escaping back into space.
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The Earth's atmosphere did become more oxygen-rich during the Proterozoic eon, after the evolution of photosynthetic organisms in the Archean eon. These photosynthetic organisms, such as cyanobacteria, produced oxygen as a byproduct of photosynthesis, gradually increasing the oxygen concentration in the atmosphere. This event is known as the Great Oxygenation Event.
Similar Questions
How did Earth develop an oxygen-rich atmosphere?Question 58Select one:Photosynthesis by algae released oxygen, which accumulated gradually.The Earth was bombarded by oxygen-rich comets which also filled the oceans with water.Sunlight broke water down to form oxygen and hydrogen.The weathering of rocks released oxygen in the rock cycle.
Which gas formed a major part of the early atmosphere?Carbon dioxideNitrogenMethaneAmmonia2The early atmosphere contained a large amount of water vapour. What happened to this?It condensed to form the oceansIt evaporated into spaceIt was used by plants for photosynthesisIt was used by animals for respiration3Which process has reduced the levels of carbon dioxide in the atmosphere to the low levels we have today?Formation of sedimentary rocksAll of theseFormation of fossil fuelsPhotosynthesis4The levels of methane and ammonia in the early atmosphere decreased over time, while the level of nitrogen increased. What is the best explanation for this?Human activities such as burning of fossil fuels and farmingMethane and ammonia are unreactive, while nitrogen reacts with oxygenMethane and ammonia react with oxygen, while nitrogen is unreactivePlants absorb methane and ammonia, and they produce nitrogen5Which two gases together form approximately 99% of the modern atmosphere?Nitrogen and oxygenNitrogen and hydrogenOxygen and hydrogenOxygen and carbon dioxide6Approximately what percentage of carbon dioxide is found in the modern atmosphere?0.9%0.004%1%0.04%
(Q008) The great oxygenation event, which added abundant oxygen to the atmosphere beginning about 2.4 Ga, was due to theGroup of answer choicesappearance of Ediacaran fauna.evolution of photosynthetic organisms in oceans.emergence of multicellular organisms.appearance of photosynthetic plants on land.
How did Earth's atmosphere become oxygen-rich?A.Biological activityB.Volcanic outgassingC.Ozone depletionD.Tectonic movementSUBMITarrow_backPREVIOUS
The main process for creating oxygen in the atmosphere was: A- photosynthesis by cyanobacteria B- meteorite impacts C- breakdown of water vapor by ultraviolet radiation D- outgassing during volcanic eruptions
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